Adjuster for blowpipe systems.



P. G. MILLER. ADJUSTER FOR BLOWPIPE SYSTEMS.

AAAAAAAAAAAAAAAAA UG. 22, 1910. 1,028,376, Patented June 4, 1912.

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ADJUSTER FOR BLCWPIPE SYSTEMS. APPLICATION FILED AUG. 22, 1910.

1,028,376, Patented June 4, 1912.

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A TTORNE Y COLUMBIA PLANOGRAPH c0., WASHINGTON. 04 c.

PHILIP C. MILLER, OF CHICAGO, ILLINOIS.

ADJUSTER FOR BLOWPIPE SYSTEMS.

Specification of Letters Patent.

Patented June 4., 1912.

Application filed August 22, 1910. Serial N 0. 578,355.

To all wlwm it may concern:

Be it known that, I, PHILIP C. MILLER, a citizen of the United States,residing at Chicago, county of Cook, and State of Illinois, haveinvented a certain new and useful Improvement in Adjusters for BlowpipeSystems, of which the following is a specification.

My invention is designed principally to be used to equalize the vacuumin the branch pipes in those systems which are designed to collect,remove and handle shavings, sawdust, chips, lint and other similarmaterial, and has for its object to provide means to reduce the velocityin the main pipes and thereby correspondingly reduce the friction, tobring the maximum suction as. near the initial point where the vacuum isrequired, (2'. e. where the shavings, etc., are fed) as is possible, andto accomplish this result for utilizing the well known tendency ofmaterial in a system of this kind to mass itself on the outer wall of acurved pipe or one side of a horizontal pipe. I am aware that adjustersseeking to accomplish this result have been constructed but they havebeen subjected to numerous object-ions. Those with which I have beenfamiliar have been placed in the branch pipe T joint near the main pipeand have a considerable tendency to cause a clogging, due to the factthat the material in its travel strikes against the adjuster and isthrown against the opposite wall of the T, and causes a clog in thebranch so that it is no longer available for use, while my adjuster isso located that this defeet will never occur.

My means of accomplishing the foregoing may be more readily understoodby having reference to the accompanying drawings which are a part ofthis specification and are hereunto annexed in which:

Figure 1 represents a plan view of a blow pipe system, the branch pipeshowing my improved invention in connection therewith. Fig. 2 is anelevation showing the piping where the system extends from one floor toanother in a building. Fig. 3 is an enlarged detail view partly insection of one of the elbows and an adjoining portion of the branchsuction pipe, showing my adjuster-in place and the manner in which thematerial travels past without coming in contact therewith. Fig. 4c is asimilar View with the ad juster located in a diflierent line of pipe.

Fig. 5 is a detail view showing the adjuster located in the main pipe.

Similar reference numerals refer to similar parts throughout the entiredescription.

As shown in the drawings, the main suction pipes are indicated by thenumeral 1. These pipes are suitably connected to an exhaust fan 2. A.pipe 3 being provided to convey the material from the fan to a dustcollector which, as shown is one of the well known cyclone type of dustcollectors in which tendency of the material to mass itself against theout-er wall of the curve is made use of to separate the material fromthe air. The main suction pipe is provided with tapering sections at forthe purpose of conforming the area thereof to the desired suction ratiorequired in the branch pipes. These branch pipes 6 extend at varyingintervals from the main suction pipe, and terminate as a rule in a hood7, which is arranged adjacent to the saw or other machine which may beproducing the refuse which the blow pipe system is to carry away. Itfrequently happens that a branch pipe, as at 8, will require a 2-inchsuction to carry away the shavings or sawdust produced by the machineadjacent to it, while the branch pipe, as at 9, will also require thesame amount of suction, being adjacent a similar machine. It thereforebecomes necessary to regulate the efiective area of the pipe 9, as itwill be apparent to persons skilled in the art, that a much greatersuction will be produced on this pipe than the pipe 8. I accomplish thisequalization by inserting my improved adjuster 10 in the section of pipe11 adjacent to the elbow 12 at an angle inclined in the direction of thetravel of the material which is being conveyed, as indicated by thearrows. The material, following the well known law referred to, massesitself upon the outer wall 13 of the elbow, as shown in Fig. 3, so thatthe adjuster 10, when located in this position, never comes in contactwith any of the material, but is used solely for the purpose ofafiecting or varying the area of the pipe to regulate the suction. Itwill be apparent from an in spection of the drawings that thisconstruction permits of the reduction of the velocity in the branchpipe, and also arranges for bringing the maximum suction very close tothe hood, which is the initial pointwhere the vacuum is required.

It will be apparent from the foregoing description that the location ofthe adjuster 10 is not limited to the exact point shown in the drawings,as there will be a number of points in a blow pipe system where myadjuster can be inserted, the only requirement being that it shalloccupy a position in a pipe where the material tends to mass upon theopposite wall, and by its presence and adjustment relative to the wall,overcomes the clogging tendency.

It is well known to persons engaged in constructing and erecting thesesystems, that the amount of suction required in the branch pipes varieswith the particular work which the machine, to which the branch pipeextends, is doing. Some machines require an inch suction, while otherswill require three inches. By the use of my improvement, it becomespossible to regulate the suction in each branch pipe to a great degreeof nicety, so that it becomes possible to provide the requisite amountof suction and no more than is necessary to handle the material in agiven case.

It is Well known that, because of friction, the current of air isretarded in the curved portions of pipes; and that by diminishing theair passage, at the curved portion, the velocity of the air current isincreased: therefore; by inserting my adjuster through the inner curveof the elbow or bend of the pipe, the objectionable features areavoided.

Having described my invention, what I regard as new and desire to secureby Letters Patent, is:

1. In a pneumatic conveyer, a pipe having a receiving hood and having acurved elbow therein, a suction means applied to the pipe, and anadjuster slidably seated within the inner curve of the elbow.

2. In a pneumatic conveyer, a suction-fan,

P. G, MILLER. Witnesses:

C. M. BAUMEISTER, H. L. COWAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner oflIPatents, Washington, D. G. i

